ChallengeAddition&Subtraction vs Make 10

This app is an educational app that allows you to practice addition and subtraction. A wide range of problems from easy to difficult are available, so you can learn at your own level. There are also features for accuracy rate, time, and score, where the score is calculated based on the time and the number of correct answers. By displaying a rank (from G to S) based on the score, it can increase your motivation to learn. If you want to improve your calculation skills, please try this app! In order to support localization, if the OS language of the device is not Japanese, it will be displayed in English. このアプリは、足し算と引き算の練習をすることができる教育アプリです。簡単な問題から難しい問題まで、幅広いレベルの問題が用意されており自分のレベルに合わせて学習することができます。また、正解率やタイム、スコアの機能があり、問題を解くのにかかった時間や正解数に基づいて、スコアが計算されます。スコアに基づいたランク（GからS）が表示されことで学習意欲を高めることができます。計算力を伸ばしたい方、是非このアプリをお試し下さい！ ローカライズ対応として端末のOS言語が日本語以外の場合は英語で表示されます。

Created by a Math Teacher A 1-minute Math Training App QuickMath Series Train your calculation skills and thinking power with short and fun math challenges. Find pairs of numbers and reach the target number! Not only “Make 10” puzzles — you can train with target numbers from 6 to 20 across different difficulty levels. Learn while playing and improve: • Number sense • Mental math • Calculation speed Perfect for quick daily brain training. Suitable for a wide range of learners — from advanced elementary school students to middle school math practice. QuickMath Series • SumX – Number Pair Puzzle • SumXMinus – Negative Number Training • Common Divisor – Divisor Brain Training • Exponent – Power Calculation Challenge